Re: Re: UV exposure light boxes

Jon,

Chris, is in the same ball park as I am using a UV/BL box with
8/20 w bulbs. We have been gettig exposures of 1min. screen and
1 to 1.5min image exposure. using digital negs from a 1280. I am
finding that I can not keep the high end from burning out. The plate
it self has a very steep curve IMO. Will do some more tests today
with a Stoufers 4x5 scale.

Keep intouch
Jan
>
> From: Jon Lybrook <jon@terabear.com>
> Date: 2004/02/04 Wed PM 03:20:54 GMT
> To: alt-photo-process-l@sask.usask.ca
> Subject: Re: UV exposure light boxes
>
> Hi Christina,
>
> Thanks for your response. Have you tried under an industrial exposure unit,
and
> if so, have you found any benefit in using that over the BLB setup?
>
> Stochastic screen it's sometimes called, but that's only if it's a random
> pattern. The ones used and recommended by David Hoptman are 80% density
with an
> even distribution of dots.
>
> Jon
>
> Christina Z. Anderson wrote:
> >>Sandy and All,
> >>
> >>Do those who hold this opinion feel it's true when exposing polymer
> >
> > photogravure
> >
> >>plates as well? I'm wondering if some who have done it believe that solar
> >>plates need more punch than UV Tubes deliver.
> >>
> >>Thanks,
> >>Jon
> >>
> >
> > My solarplates are exposing for 1 minute under the dot screen thing what
the
> > heck is it called and about 1 minute under the digital negative, in my
> > Edwards unit of BLB bulbs (or is it BL, they are pale purple, not Jimmy
> > Hendrix deep purple).
> > Chris
> >
> >
> >
>
>
>
Received on Wed Feb 4 11:28:14 2004